rsFifoSocket.cpp revision b0934b67b95cc27e2358c2aa4db5f7c1067c8f9b
1/* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#include "rsFifoSocket.h" 18 19#include <stdio.h> 20#include <stdlib.h> 21#include <ctype.h> 22#include <unistd.h> 23#include <poll.h> 24#include <sys/types.h> 25#include <sys/socket.h> 26 27using namespace android; 28using namespace android::renderscript; 29 30FifoSocket::FifoSocket() { 31 mShutdown = false; 32} 33 34FifoSocket::~FifoSocket() { 35 36} 37 38bool FifoSocket::init(bool supportNonBlocking, bool supportReturnValues, size_t maxDataSize) { 39 int ret = socketpair(AF_UNIX, SOCK_STREAM, 0, sv); 40 return false; 41} 42 43void FifoSocket::shutdown() { 44 mShutdown = true; 45 uint64_t d = 0; 46 ::send(sv[0], &d, sizeof(d), 0); 47 ::send(sv[1], &d, sizeof(d), 0); 48 close(sv[0]); 49 close(sv[1]); 50} 51 52bool FifoSocket::writeAsync(const void *data, size_t bytes, bool waitForSpace) { 53 if (bytes == 0) { 54 return true; 55 } 56 //ALOGE("writeAsync %p %i", data, bytes); 57 size_t ret = ::send(sv[0], data, bytes, 0); 58 rsAssert(ret == bytes); 59 if (ret != bytes) { 60 ALOGE("writeAsync %p %zu ret %zu", data, bytes, ret); 61 } 62 return true; 63} 64 65void FifoSocket::writeWaitReturn(void *retData, size_t retBytes) { 66 if (mShutdown) { 67 return; 68 } 69 70 //ALOGE("writeWaitReturn %p %i", retData, retBytes); 71 size_t ret = ::recv(sv[0], retData, retBytes, MSG_WAITALL); 72 //ALOGE("writeWaitReturn %i", ret); 73 rsAssert(ret == retBytes); 74} 75 76size_t FifoSocket::read(void *data, size_t bytes) { 77 if (mShutdown) { 78 return 0; 79 } 80 81 //ALOGE("read %p %i", data, bytes); 82 size_t ret = ::recv(sv[1], data, bytes, MSG_WAITALL); 83 rsAssert(ret == bytes || mShutdown); 84 //ALOGE("read ret %i bytes %i", ret, bytes); 85 if (mShutdown) { 86 ret = 0; 87 } 88 return ret; 89} 90 91bool FifoSocket::isEmpty() { 92 struct pollfd p; 93 p.fd = sv[1]; 94 p.events = POLLIN; 95 int r = poll(&p, 1, 0); 96 //ALOGE("poll r=%i", r); 97 return r == 0; 98} 99 100 101void FifoSocket::readReturn(const void *data, size_t bytes) { 102 //ALOGE("readReturn %p %Zu", data, bytes); 103 size_t ret = ::send(sv[1], data, bytes, 0); 104 //ALOGE("readReturn %Zu", ret); 105 //rsAssert(ret == bytes); 106} 107 108 109